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Journal articles on the topic 'Dq-transformation'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2025

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1

Son, Dong-Kyun, Soon-Ho Kwon, Dong-Ok Kim, Hee-Sue Song, and Geun-Ho Lee. "Control Comparison for the Coordinate Transformation of an Asymmetric Dual Three Phase Synchronous Motor in Healthy and Single-Phase Open Fault States." Energies 14, no. 6 (2021): 1735. http://dx.doi.org/10.3390/en14061735.

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The coordinate transformation method of asymmetric dual three phase synchronous motor (ADTP-SM) is a Double dq transform using two dq-axes and a vector space decomposition (VSD) model method using the orthogonality of ADTP-SM. There are several studies comparing the two methods in a healthy state, but few in a single-phase open fault state. In the healthy, when the VSD model is applied, different harmonic orders of the phase current are projected onto the dq and xy-axes (the axis for controlling harmonics of the phase current), and the two-axes are orthogonal, so it can be controlled stably. I

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2

Pradeep, Jayarama, and R. Devanathan. "Adoption of Park’s Transformation for Inverter Fed Drive." International Journal of Power Electronics and Drive Systems (IJPEDS) 5, no. 3 (2015): 366. http://dx.doi.org/10.11591/ijpeds.v5.i3.pp366-373.

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Park’s transformation in the context of ac machine is applied to obtain quadrature voltages for the 3-phase balanced voltages. In the case of a inverter fed drive, one can adopt Park’s transformation to directly derive the quadrature voltages in terms simplified functions of switching parameters. This is the main result of the paper which can be applied to model based and predictive control of electrical machines. Simulation results are used to compare the new dq voltage modelling response to conventional direct –quadrature (dq) axes modelling response in direct torque control – space vector m

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3

Guo, Zhicheng. "Three-phase unbalanced voltage sag detection method based on morphological filtering." Journal of Physics: Conference Series 2254, no. 1 (2022): 012035. http://dx.doi.org/10.1088/1742-6596/2254/1/012035.

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Abstract In dynamic voltage restorer (DVR), accurate and fast voltage sag detection method is the key. However, in the case of three-phase imbalance, the traditional voltage sag detection method still has shortcomings in real-time and accuracy. Therefore, a voltage sag detection method based on morphological filter is proposed. That is, based on the commonly used dq transformation method, the morphological filter is used to replace the Butterworth low-pass filter to suppress the second harmonic generated by the negative sequence component after dq transformation in the case of three-phase imba

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4

Man, Li, Chen Gusheng, and Gao Ying. "Adaptive Frequency Shift Islanding Detection Method Based on dq Transformation." IOP Conference Series: Earth and Environmental Science 621 (January 23, 2021): 012181. http://dx.doi.org/10.1088/1755-1315/621/1/012181.

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5

Wang, Zhiping, Yunxiang Xie, Yunshou Mao, and Chi Xu. "Analysis and control for matrix rectifier by circuit DQ transformation." IEICE Electronics Express 12, no. 23 (2015): 20150818. http://dx.doi.org/10.1587/elex.12.20150818.

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6

Hao, Xiaohong, Yangtao Wang, Shuaizheng Sun, Shan Jiang, and Yan Liu. "The Detection Algorithm Based on the Short Time Delay for Three-Phase Unbalanced Voltage Sag." Electronics 11, no. 17 (2022): 2646. http://dx.doi.org/10.3390/electronics11172646.

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To improve the detection speed of the three-phase unbalanced voltage sag, the traditional αβ/dq transformation algorithm can be applied. However, in this algorithm, the virtual quadrature voltage signal (VQVS) needs to be accurately constructed in the αβ coordination system. Then, the information of the voltage jump can be achieved by the αβ/dq transformation. However, the traditional algorithm for constructing the VQVS introduces the harmonic component, so that the detection speed and accuracy is low. To solve the problem, this article modifies the algorithm and presents a new algorithm based

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7

Matayoshi, Hidehito, Takahiro Uehara, Gul Ahmad Ludin, Aditya Sharma, Manoj Datta, and Tomonobu Senjyu. "Uninterruptible smart house equipped with a single-phase dq-transformation system." Journal of Renewable and Sustainable Energy 8, no. 2 (2016): 025101. http://dx.doi.org/10.1063/1.4942781.

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8

Yang, Daliang, Li Yin, Shengguang Xu, and Ning Wu. "Power and Voltage Control for Single-Phase Cascaded H-Bridge Multilevel Converters under Unbalanced Loads." Energies 11, no. 9 (2018): 2435. http://dx.doi.org/10.3390/en11092435.

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The conventional control method for a single-phase cascaded H-bridge (CHB) multilevel converter is vector (dq) control; however, dq control requires complicated calculations and additional time delays. This paper presents a novel power control strategy for the CHB multilevel converter. A power-based dc-link voltage balance control is also proposed for unbalanced load conditions. The new control method is designed in a virtual αβ stationary reference frame without coordinate transformation or phase-locked loop (PLL) to avoid the potential issues related to computational complexity. Because only

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9

Yokoyama, Tomoki, and Tsuyoshi Komiyama. "High-speed Single-Phase PLL Control by Quasi dq Transformation Using FPGA." IEEJ Transactions on Industry Applications 129, no. 10 (2009): 964–71. http://dx.doi.org/10.1541/ieejias.129.964.

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10

Hong, Sun-Ki, and Jin-Ho Park. "A Study on AC Machine Modeling using Complex Vector and dq Transformation." Transactions of The Korean Institute of Electrical Engineers 61, no. 11 (2012): 1601–5. http://dx.doi.org/10.5370/kiee.2012.61.11.1601.

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11

Alharbi, Mohammed, Semih Isik, Abdulaziz Alkuhayli, and Subhashish Bhattacharya. "Power Ripple Control Method for Modular Multilevel Converter under Grid Imbalances." Energies 15, no. 10 (2022): 3535. http://dx.doi.org/10.3390/en15103535.

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Modular multilevel converters (MMCs) are primarily adopted for high-voltage applications, and are highly desired to be operated even under fault conditions. Researchers focused on improving current controllers to reduce the adverse effects of faults. Vector control in the DQ reference domain is generally adopted to control the MMC applications. Under unstable grid conditions, it is challenging to control double-line frequency oscillations in the DQ reference frame. Therefore, active power fluctuations are observed in the active power due to the uncontrolled AC component’s double line frequency

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12

Albino, A. P., A. N. Houghton, M. Eisinger, et al. "Class II histocompatibility antigen expression in human melanocytes transformed by Harvey murine sarcoma virus (Ha-MSV) and Kirsten MSV retroviruses." Journal of Experimental Medicine 164, no. 5 (1986): 1710–22. http://dx.doi.org/10.1084/jem.164.5.1710.

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Human melanocytes infected with Ki-MSV or Ha-MSV, but not amphotropic MuLV, undergo a series of transformation-related changes that are characteristic of malignant melanoma. These are (a) expression of Ia antigens, in particular DP, DQ, and DR class II histocompatibility gene products, (b) a transformed morphology and ability to grow in soft agar, and (c) a 5-10-fold increase in the cell surface expression of GD3 ganglioside. However, other characteristics of melanoma, such as independence from specific growth factors and loss of adenosine deaminase binding protein were not observed. We conclu

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13

JANASZEK, Michał. "EXTENDED CLARKE TRANSFORMATION FOR n-PHASE SYSTEMS." Proceedings of Electrotechnical Institute 63 (December 15, 2016): 5–26. http://dx.doi.org/10.5604/01.3001.0009.4333.

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The article describes how to convert space vectors written in a stationary multiphase system, consisting of a number of phases where n > 3, to the stationary alfa beta orthogonal coordinate system. The transformation of vectors from a stationary n-phase system to the stationary alfa beta orthogonal coordinate system is defined The inverse transformation of a vector written in the orthogonal coordinate system to a stationary n-phase system is also defined. The application of the extended Clarke transformation allows control calculations to be performed in both stationary alfa beta

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14

Hong, Sun-Ki. "A Study of General AC Machine Modeling with Matrix Vector Using DQ Transformation." Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 27, no. 8 (2013): 98–104. http://dx.doi.org/10.5207/jieie.2013.27.8.098.

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15

ZHOU, H., E. PERFECT, B. G. LI, and Y. Z. LU. "EFFECTS OF BIT DEPTH ON THE MULTIFRACTAL ANALYSIS OF GRAYSCALE IMAGES." Fractals 18, no. 01 (2010): 127–38. http://dx.doi.org/10.1142/s0218348x10004749.

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Multifractal box counting analysis has been widely applied to study the scaling characteristics of grayscale images. Since bit depth is an important property of such images it is desirable know the impact of varying bit depths on the estimation of the generalized dimensions (Dq). We generated random geometrical multifractal grayscale fields, which were then transformed from double precision to 16, 13, and 8 bit depths. Digitized grayscale images of soil thin sections at 13 bit depth were also selected for study and transformed to 8 bit depth. The moment based box counting method was applied to

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16

Arise, Nagasridhar, Madde Saiteja, V. Siddu, Vadluri Kavya, and Mada Vijay. "Optimized control strategy for a three-phase grid connected inverter using PI controller and DQ frame." International Journal of Applied Power Engineering (IJAPE) 13, no. 4 (2024): 790. http://dx.doi.org/10.11591/ijape.v13.i4.pp790-797.

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This paper provides a proportional-integral (PI) controller and direct-quadrature (DQ) frame transformation-based optimum control method for a three-phase grid-connected inverter. In terms of grid synchronization, voltage regulation, and harmonic abatement, the proposed control technique attempts to improve the inverter's performance. By separating the control of active and reactive power, the control structure is made simpler and independent regulation of these parameters is possible. This improves the inverter's capacity to quickly react to grid disruptions and track reference values accurat

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17

Arise, Nagasridhar, Madde Saiteja, V. Siddu, and Mada Vijay. "Optimized control strategy for a three-phase grid connected inverter using PI controller and DQ frame." International Journal of Applied Power Engineering 13, no. 4 (2025): 790–97. https://doi.org/10.11591/ijape.v13.i4.pp790-797.

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This paper provides a proportional-integral (PI) controller and direct-quadrature (DQ) frame transformation-based optimum control method for a three-phase grid-connected inverter. In terms of grid synchronization, voltage regulation, and harmonic abatement, the proposed control technique attempts to improve the inverter's performance. By separating the control of active and reactive power, the control structure is made simpler and independent regulation of these parameters is possible. This improves the inverter's capacity to quickly react to grid disruptions and track reference values accurat

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18

Ameerul, A. J. Jeman, M. S. Hannoon Naeem, Hidayat Nabil, M. H. Adam Mohamed, Musirin Ismail, and V.6 Vijayakumar. "Experimental study on transient response of fuel cell." Bulletin of Electrical Engineering and Informatics 8, no. 2 (2019): 375–81. https://doi.org/10.11591/eei.v8i2.1431.

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This research work discusses a control strategy to enhance the transient response of the fuel cell and boost the real and reactive power flow from grid connected to fuel cell. The current output of the fuel cell depends on the availability of hydrogen in the fuel cell stack, a battery bank is implemented to supply the transient current and to prevent it from hydrogen saturation. The battery should only supply when there is a transient. During steady state the total power is produced by the fuel cell by regulating its hydrogen input. A prototype of the system will be created to study a control

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19

Hao, Tianqu, Feng Gao, and Tao Xu. "Fast Symmetrical Component Extraction From Unbalanced Three-Phase Signals Using Non-Nominal dq -Transformation." IEEE Transactions on Power Electronics 33, no. 11 (2018): 9134–41. http://dx.doi.org/10.1109/tpel.2018.2822941.

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20

Bhanu, P., and N. Pappa. "SVPWM: Torque Level Controlling of Wind Turbine System Using Fuzzy and ABC-DQ Transformation." International Journal of Fuzzy Systems 19, no. 1 (2016): 141–54. http://dx.doi.org/10.1007/s40815-016-0157-1.

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21

Binkowski, Tomasz, and Paweł Szcześniak. "Independent Control of Active and Reactive Power Flow for a Single-Phase, Unidirectional Onboard Power Converter Connecting the DC Power Bus to the AC Bus." Energies 17, no. 2 (2024): 540. http://dx.doi.org/10.3390/en17020540.

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The paper presents a proposed system that supplies a 400 Hz single-phase onboard grid from the DC onboard bus. This system enables independent compensation of reactive power in the AC grid. Independent control of active and reactive power flow requires the decomposition of current in the grid into active and reactive components. Independent control of active and reactive power requires the use of synchronizers that operate in the dq frame system. If synchronization is performed with a single-phase grid, the transformation of dq requires the virtual quadrature signals. Standard quadrature signa

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22

Xing, Feng, Xiaoyu Song, Yuge Gao, and Chaoning Zhang. "Toward Reducing Undesired Rotation Torque in Maglev Permanent Magnet Synchronous Linear Motor." Energies 16, no. 16 (2023): 6066. http://dx.doi.org/10.3390/en16166066.

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The dq current transformation method can be used to achieve the drive control of the maglev permanent magnet synchronous linear motor (MPMSLM). Specifically, the control of the suspension force Fz can be achieved by controlling the d-axis current, and the control of the thrust force Fx can be achieved by controlling the q-axis current. However, the direct use of the dq current transformation method on traditional MPMSLM structures produces an additional rotation torque around the y-axis. In order to reduce this additional torque, a new MPMSLM structure is proposed in this work. First, the char

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23

Janaszek, M. "Structures of vector control of n-phase motor drives based on generalized Clarke transformation." Bulletin of the Polish Academy of Sciences Technical Sciences 64, no. 4 (2016): 865–72. http://dx.doi.org/10.1515/bpasts-2016-0094.

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Abstract The paper presents vector control structures for n-phase AC motors derived from generalized Clarke transformation. In contrast to known works, where authors operate on generalized formulas of the Clarke transformation, in this work, only a number of actually used phases, of mostly industrial purposes, are considered (n = 5, 6, 2×3). This allows to perform control calculations in stationary orthogonal coordinates aβ or rotating dq. There are implementations of different control strategies: ROC (rotor-oriented control) or FOC (field-oriented control). Next, the paper presents the novel

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24

Hong, Sun-Ki, and Yoo-Chung Na. "Analysis of 3-phase Induction Motor considering Current Regulator using DQ Transformation with Matrix Vector." Journal of international Conference on Electrical Machines and Systems 3, no. 2 (2014): 116–20. http://dx.doi.org/10.11142/jicems.2014.3.2.116.

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25

González, Mario, Víctor Cárdenas, and Ricardo Álvarez-Salas. "Generation of new harmonics caused by the processing of DQ transformation in power quality compensators." International Transactions on Electrical Energy Systems 29, no. 2 (2018): e2717. http://dx.doi.org/10.1002/etep.2717.

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26

Toub, Mohamed, Mehrzad M. Bijaieh, Wayne W. Weaver, Rush D. Robinett III, Mohamed Maaroufi, and Ghassane Aniba. "Droop Control in DQ Coordinates for Fixed Frequency Inverter-Based AC Microgrids." Electronics 8, no. 10 (2019): 1168. http://dx.doi.org/10.3390/electronics8101168.

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This paper presents a proof-of-concept for a novel dq droop control technique that applies DC droop control methods to fixed frequency inverter-based AC microgrids using the dq0 transformation. Microgrids are usually composed of distributed generation units (DGUs) that are electronically coupled to each other through power converters. An inherent property of inverter-based microgrids is that, unlike microgrids with spinning machines, the frequency of the parallel-connected DGUs is a global variable independent from the output power since the inverters can control the output waveform frequency

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27

Somani, Mahesh C., David A. Porter, L. Pentti Karjalainen, and R. D. K. Misra. "Designing a Novel DQ&P Process through Physical Simulation Studies." Materials Science Forum 762 (July 2013): 83–88. http://dx.doi.org/10.4028/www.scientific.net/msf.762.83.

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This study presents the use of physical and laboratory rolling simulations for the development of a novel direct quenching and partitioning (DQ&P) process for the development of tough ductile ultra-high strength structural steels with yield strengths ~1100 MPa and reasonable ductility and toughness. Suitable compositions were designed based on high silicon and/or aluminium content. The DQ&P parameters were established with the aid of physical simulation on a Gleeble simulator. Two types of dilatation tests were carried out: with or without prior straining in the no-recrystallization re

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28

Zhang, Bo, Cheng Li, Limin Zhang, and Feng Xie. "Size-Dependent Free Vibration of Non-Rectangular Gradient Elastic Thick Microplates." Symmetry 14, no. 12 (2022): 2592. http://dx.doi.org/10.3390/sym14122592.

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The free vibration of isotropic gradient elastic thick non-rectangular microplates is analyzed in this paper. To capture the microstructure-dependent effects of microplates, a negative second-order gradient elastic theory with symmetry is utilized. The related equations of motion and boundary conditions are obtained using the energy variational principle. A closed-form solution is presented for simply supported free-vibrational rectangular microplates with four edges. A C1-type differential quadrature finite element (DQFE) is applied to solve the free vibration of thick microplates. The DQ rul

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29

KLYUCHNIKOV, Anatoly T. "A Speed Observer for Sensorless Control of an Induction Motor." Elektrichestvo 2, no. 2 (2021): 54–59. http://dx.doi.org/10.24160/0013-5380-2021-2-54-59.

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Half a century has passed since the time F. Blaschke received a patent for vector control of an induction motor with a speed sensor and a Hall sensor. Since that time, the transformation of generalized vectors in the Park—Gorev equations as projections on the axes in different coordinate frames aft, dq, and xy has been regarded to be a commonly accepted one. With this approach, five differential and four algebraic equations with cross-links have to be solved for studying the processes in an induction motor, which involves certain inconvenience of analyzing the processes in the machine. Eventua

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30

Fujii, Rikiya, and Hiroaki Kakigano. "Experimental Verification on 3-phase Converter using DQ Transformation with Positive Sequence Voltage during Grid Faults." Journal of the Japan Institute of Power Electronics 49 (2023): 48–54. http://dx.doi.org/10.5416/jipe.49.48.

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31

Kim, Wonhee, Chuan Yang, and Chung Choo Chung. "Design and Implementation of Simple Field-Oriented Control for Permanent Magnet Stepper Motors Without DQ Transformation." IEEE Transactions on Magnetics 47, no. 10 (2011): 4231–34. http://dx.doi.org/10.1109/tmag.2011.2157956.

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32

Zhao, Feng Jiao, Jiu He Wang, and Bai Le Zhang. "Research on the PCHD Control Strategy for Three-Phase Voltage Source PWM Rectifier under Unbalanced Supply Voltage Condition." Applied Mechanics and Materials 571-572 (June 2014): 959–64. http://dx.doi.org/10.4028/www.scientific.net/amm.571-572.959.

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In order to improve the performance of the rectifier under unbalanced voltage condition, this paper adopts port-controlled Hamiltonian dissipation (PCHD) control strategy. On the basic of the mathematical model of the three-phase voltage source PWM rectifier, its PCHD model in synchronous dq coordinates was established by orthogonal transformation. The desired equilibrium point of the system was obtained according to the target of the design. The controller was designed with the method of interconnection and damping assignment, and the PI control method was introduced to restrain the steady-st

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33

Wen, Quan, and Ling Zhu. "Study of PWM Voltage Source Rectifier Based on Predictive Current Control Strategy." Applied Mechanics and Materials 380-384 (August 2013): 3069–72. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.3069.

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Traditional current strategy based on dq transformation used in three-phase PWM voltage source rectifier (VSR) has some shortcomings, such as dynamic response slow and DC voltage fluctuation. According to the problems, firstly this paper established discrete mathematical model of VSR, derived predictive current control strategies for VSR. Secondly, design a dual-closed-loop controller with current inner loop and voltage outer loop for the system. Finally, experimental researches are done. The results show that the three-phase PWM voltage source rectifier based on predictive current control in

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34

Costin, Madalin, and Corneliu Lazar. "Induction Motor Improved Vector Control Using Predictive and Model-Free Algorithms Together with Homotopy-Based Feedback Linearization." Energies 17, no. 4 (2024): 875. http://dx.doi.org/10.3390/en17040875.

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Vector control of an induction machine (IM) is typically performed by using cascade control structures with conventional linear proportional–integral (PI) controllers, the inner loop being designed for current control and the outer loop for rotor flux and speed control. In this paper, starting with the dq model of the IM, advanced control algorithms are proposed for the two control loops of the cascade structure. For the current inner loop, after the decoupling of the two dq currents, predictive control algorithms are employed to independently control the currents, considering the constraints

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35

Jin, Wei, Feng Gao, and Lu Liu. "Impedance Reshaping and Stability Analysis of the Unbalanced Three-phase System Considering the Grid-tied Inverter based Imbalance Compensation." Journal of Physics: Conference Series 2087, no. 1 (2021): 012018. http://dx.doi.org/10.1088/1742-6596/2087/1/012018.

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Abstract Grid-tied inverters have been adopted both as the interface of renewable energy resources and as a solution to address power quality issues. To compensate the imbalance distortion caused by asymmetric local load, DQ transformation based compensation method is introduced into the control scheme of the grid-tied inverter. Taking both the inverter control scheme and circuit topology into account, the space vector based impedance modelling and stability analysis approaches are proposed in this paper to analyse the dynamic of the asymmetric system with active imbalance compensation. The pr

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36

Murthy, G. V. K., Sowjan Kumar, B. Nagaraju, R. Shankar, C. Rajalingam, and C. Rajaselvan. "Power Factor Compensation for a Single-Phase AC-DC Hybrid Micro-Grid." International Journal of Innovative Research in Engineering and Management 9, no. 5 (2022): 327–30. http://dx.doi.org/10.55524/ijirem.2022.9.5.49.

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A single-phase AC-DC Hybrid Micro-Grid (HMG) power flow control strategy is modeled and simulated in this paper. Two AC and two DC zones are separated by a bidirectional interlinking converter (BIC) in the full bridge IGBT structure, which is a typical H-Bridge inverter/rectifier, in the proposed HMG system topology. Based on the DQ transformation theory, the BIC's switching pattern comes from one voltage loop (Vdc) and two power control loops. The transfer of both active and reactive power between the HMG and the public AC Grid is controlled by this control strategy. Additionally, this can be

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37

Iqteit, Nassim A., Khalid Yahya, Firas M. Makahleh, et al. "Simple Mathematical and Simulink Model of Stepper Motor." Energies 15, no. 17 (2022): 6159. http://dx.doi.org/10.3390/en15176159.

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This paper presents a simple mathematical and Simulink model of a two-phase hybrid stepper motor, where ignoring the permeance space harmonics of the hybrid stepper motor is regarded as the main physical assumption in this article. Moreover, the dq transformation method is adopted as the main mathematical approach for the derivation of the proposed model, where simple voltages, currents, and torque equations are obtained and used to build the proposed Simulink and circuit model of the stepper motor. The validity and the effectiveness of the proposed model are examined by comparing its results

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38

Viola, Erasmo, Francesco Tornabene, Nicholas Fantuzzi, and Michele Bacciocchi. "Numerical Investigation of Composite Materials with Inclusions and Discontinuities." Key Engineering Materials 747 (July 2017): 69–76. http://dx.doi.org/10.4028/www.scientific.net/kem.747.69.

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The present study aims to show a novel numerical approach for investigating composite structures wherein inclusions and discontinuities are present. This numerical approach, termed Strong Formulation Finite Element Method (SFEM), implements a domain decomposition technique in which the governing partial differential system of equations is solved in a strong form. The provided numerical solutions are compared with the ones of the classic Finite Element Method (FEM). It is pointed out that the stress and strain components of the investigated model can be computed more accurately and with less de

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39

Palka, Ryszard, and Rafal Piotuch. "Usage of FEM for synthesis of dead-beat current controller for permanent magnet synchronous motor." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 5 (2019): 1386–400. http://dx.doi.org/10.1108/compel-12-2018-0534.

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Purpose Predictive controllers and permanent magnet synchronous motors (PMSMs) got more attention over the past decades thanks to their applicable features. This paper aims to propose and verify a method to design a predictive current controller with consideration of motor characteristics obtained from finite element analysis (FEA). Design/methodology/approach Permanent magnet motor parameters and its maps can be calculated by means of FEA. The model takes into account magnetic saturation and thermal electro-magnetic properties. For each dq current vector and each position, self and mutual ind

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40

Soo-Bin Han, Nam-Sup Choi, Chun-Taik Rim, and Gyu-Hyeong Cho. "Modeling and analysis of static and dynamic characteristics for buck-type three-phase PWM rectifier by circuit DQ transformation." IEEE Transactions on Power Electronics 13, no. 2 (1998): 323–36. http://dx.doi.org/10.1109/63.662849.

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41

Zhou, Zhiquan, Jiyu Song, Yanjun Yu, Qingrui Xu, and Xinhang Zhou. "Research on High-Quality Control Technology for Three-Phase PWM Rectifier." Electronics 12, no. 11 (2023): 2417. http://dx.doi.org/10.3390/electronics12112417.

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With the development of power-electronics technology, PWM rectifiers are widely used in many fields. They are especially suitable for high-precision- and high-efficiency-application scenarios, such as communication and industrial control. Although it has many advantages, overshoot control during startup is a challenge. Therefore, this paper first derives the input–output mathematical model through equation establishment and dq-coordinate transformation. Next, a voltage and current double closed-loop simulation model is established in MATLAB/Simulink, and its control effect is analyzed. On this

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42

Veinović, Slavko, Žarko Janda, Đorđe Stojić, et al. "Load angle estimation of synchronous generator." Zbornik radova Elektrotehnicki institut Nikola Tesla 30, no. 30 (2020): 81–91. http://dx.doi.org/10.5937/zeint30-29158.

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In this paper a load angle estimation method of round rotor synchronous generator is presented, for load angle limiter in AVR systems design purpose. To get information of load angle, it is necessary to have values of the one terminal voltage, one phase current and q-axis reactance Xq. Mentioned values are acquired by synchronous sampling technique and processed by discrete Fourier transformation. The accuracy of presented method highly depends on quality of zero-crossing detection of the input voltage signal and on the calculation estimation of the fundamental frequency. This method is of red

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43

Abrol, Monika, Megha Pandeya, Neeraj Sharma, and Kuldeep Singh Kulhar. "Improvement of Voltage Quality in a Distribution System by a Novel Simplified Unit Vector Theory." E3S Web of Conferences 540 (2024): 09009. http://dx.doi.org/10.1051/e3sconf/202454009009.

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Nowadays, electrical engineers are increasingly concerned about power quality due to the rising load demand and the utilization of non-linear loads by end users. Power must be supplied continuously and with excellent quality. Voltage variation is a prevalent occurrence in power distribution systems due to the presence of reactance in AC systems and fluctuations in load demand. The dynamic voltage restorer is a compensation device that effectively resolves voltage problems within power distribution systems. The theory of synchronous reference frame is utilized for controlling the DVR components

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Wang, Zhiqiang, Yan Niu, Xiayu Yan, and Xin Gu. "Low-Carrier-Ratio Modulation Strategy Based on Improved Flux Ripple Model." Energies 15, no. 6 (2022): 2173. http://dx.doi.org/10.3390/en15062173.

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Since the quality of the direct and quadrature axis current (dq-axis) is an important performance indicator of a motor, the technique of flux ripple analysis is necessary to determine the appropriate working conditions for various voltage sequences and reduce current fluctuations. However, the traditional flux ripple model cannot analyze dq-axis flux ripples (except under no-load conditions). Therefore, it is unable to calculate the modulation ratio and voltage angle (angle between the reference vector and the q-axis) ranges to satisfy the given q-axis (or d-axis) current fluctuation requireme

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Cavadini, Simone, Veronika Vitzthum, Simone Ulzega, Anuji Abraham, and Geoffrey Bodenhausen. "Line-narrowing in proton-detected nitrogen-14 NMR." Journal of Magnetic Resonance 202, no. 1 (2010): 57–63. https://doi.org/10.1016/j.jmr.2009.09.018.

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In solids spinning at the magic angle, the indirect detection of single-quantum (SQ) and double-quantum (DQ) N-14 spectra (l = 1) via spy nuclei S = 1/2 such as protons can be achieved in the manner of heteronuclear single- or multiple-quantum correlation (HSQC or HMQC) spectroscopy. The HMQC method relies on the excitation of two-spin coherences of the type T-11(l) T-11(S) and T-21(l) T-11(S) at the beginning of the evolution interval t(1). The spectra obtained by Fourier transformation from t(1) to omega(1) may be broadened by the homogenous decay of the transverse terms of the spy nuclei S.

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Masrur, M. A. "Studies on the effect of filtering, digitization, and computation algorithm on the ABC-DQ current transformation in PWM inverter drive system." IEEE Transactions on Vehicular Technology 44, no. 2 (1995): 356–65. http://dx.doi.org/10.1109/25.385929.

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Yadav, Rasiyawan, and Preet Lata. "DC Voltage Balancing Technique for CMI-Based STATCOM: A Generic Control Approach." Journal of Futuristic Sciences and Applications 4, no. 2 (2021): 39–46. http://dx.doi.org/10.51976/jfsa.422106.

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This article provides a generic technique for per phase DC bus voltage balancing that might be used in a CMI based STATCOM. The STATCOM system parameter model and the conventional control technique are examined first. A per phase DC bus voltage balancing mechanism is detailed using a dq/abc park transformation and the loop-gain shaped control design technique. This approach aims to maintain a constant DC bus voltage. The dc capacitor may be controlled globally by a proportional resonant controller. A controller that rejects disturbances may be used to regulate clustered loads. By facing a numb

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Veinović, Slavko, Žarko Janda, Đorđe Stojić, et al. "Load Angle Estimation of Synchronous Generator." Zbornik radova, Elektrotehnički institut Nikola Tesla 30, no. 30 (2020): 81–91. https://doi.org/10.5937/zeint30-29158.

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In this paper a load angle estimation method of round rotor synchronous generator is presented, for load angle limiter in AVR systems design purpose. To get information of load angle, it is necessary to have values of the one terminal voltage, one phase current, and q-axis reactance Xq. Mentioned values are acquired by synchronous sampling technique and processed by discrete Fourier transformation. The accuracy of the presented method highly depends on quality of zero-crossing detection of the input voltage signal and on the calculation estimation of the fundamental frequency. This method is o

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49

Kato, Masayuki, and Katsuhiro Hirata. "Control of three-degree-of-freedom resonant actuator driven by novel vector control." Transportation Systems and Technology 4, no. 3 (2018): 90–101. http://dx.doi.org/10.17816/transsyst20184390-101.

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This paper presents a novel vector control method for three-degree-of-freedom resonant actuator in order to improve its controllability. The effectiveness of the presented method is verified through electromagnetic field analysis using 3-D finite element method: Issue: A three-degree-of-freedom resonant actuator has a great potential to broaden the application range of linear oscillatory actuators because it has a lot of advantages: high efficiency, simple structure, etc. However, this actuator has low controllability because the magnetic structure of each axis is not independent.

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Donfack, Clément Kengnou, Charles Hubert Kom, Jean Jacques Mandeng, and Félix Paune. "Design of a New Duty Cycle Modulation to Improve the Energy Quality of an Insulated Production System." European Journal of Electrical Engineering 23, no. 4 (2021): 311–19. http://dx.doi.org/10.18280/ejee.230404.

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In this article, we propose a new strategy for controlling three-phase inverters of renewable energy sources, based on the Duty Cycle Modulatiom (DCM) control using the Park and Fortescue transformation (DCM-dq-dih). Our goals in setting and using this strategy are, on the one hand, to induce a lower harmonic rate as compared to the SPWM (Sinusoidal Pulse Width Modulation) strategy and on the other hand, this control technique enables the inverter to deliver balanced voltages, be it in the event of load unbalance. Our design is built on the basis of the known mode of DCM control of single-phas

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